1995 Johnson/Evinrude Outboards 25, 35 3-Cylinder Service Manual, Page 60Get this manual
Function Test
Two tests must be conducted to ensure proper fuel deliveryThe first test will check the suction pumps' ability to draw fuel from the fuel tankThe second test will check the pressure pumps' ability to supply fuel to the oiling unit and the carburetorsConduct these tests with the motor in test tank or on the boatBefore testing, loosen fuel tank gas cap momentarily to release any pressure that may have built upFuel tank must not be more than 30 in(76 cm) below fuel pumpSuction Pump Test
rn 1Removevacuum gauge (obtained suction fuel pump hosethe fuel inlet fitting to locally) between the fuel Connect fuel
inlet fitting and the suction pump2Start motor and observe gaugePump vacuum gauge should read no more than in(102 mm) of mercury (Hg)3If fuel pump does not meet these specifications, replace it When installing new fuel pump, apply ONIC Nut Lockto threads of screwsInstall screws and torque to 24-36 inIbs(2,8-4,0 Nm)Pressure Pu mp Test